Meteorological Warning

Showers with storm this afternoon for several areas of the country

May 10, 2024

9:45 am

Diagnosis: Local factors such as sea breezes and high temperatures combined with the activity of the Intertropical Convergence Zone and the high humidity content favor unstable atmospheric conditions in the southern Central American region. During the early hours of the morning and early hours of the morning, downpours with storms were recorded in maritime areas of the Central and South Pacific, favoring the entry of cloudiness towards the land part of these regions. Forecast: During the morning the entry of cloudiness will continue in the Central and South Pacific, as well as in the Nicoya Peninsula with the possibility of scattered weak rains. For this afternoon, the analyzes of the numerical prediction models indicate a high probability of heavy downpours accompanied by electrical storms for the North Pacific (with greater intensity in the center of the region and around the Gulf of Nicoya), Central Pacific (Zones mountainous in the afternoon and coastal sectors at the beginning of the night) and South Pacific (especially in mountainous areas and in the border sector). The maximum amounts are estimated between 40 - 70 mm with specific maximums between 90 - 100 mm. The analyzes also indicate a high probability of rains of variable intensity for most of the Central Valley with the strongest downpours and storms mainly in the northern and western sectors. Maximum amounts are estimated between 40-70 mm with the possibility of localized higher amounts. As for the Northern Zone and Caribbean regions, scattered showers with storms are expected in mountainous sectors. The estimated cumulative amounts will be between 15 - 30 mm with localized maximums of up to 50 mm. These precipitations can last until the early hours of the night. Warning: Attention in sectors of the North Pacific (around the Gulf of Nicoya and the mountainous southeast), Central Pacific and South Pacific due to humid soils both in low parts and especially in mountainous areas. Special attention in urban areas of the Central Valley due to possible flooding due to sewage saturation. Be attentive to the development of storm clouds which present their own and significant characteristics such as descending gusts, high precipitation intensity in short periods of time and electrical discharges. Due to the above, the IMN recommends: • Caution due to sewage saturation in places prone to this type of flooding. • Prevention against electrical storms and seeking shelter in a safe place in case strong gusts of wind occur or are perceived near storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach 80 km/h in some isolated cases. • Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr Roberto Vindas Meteorologist DMSA-IMN